building Elemental fails

[Edward Vigmond]

Hello

I cannot build Elemental. I am using OpenSuse 12.2. I think the issue comes from having installed petsc-3.3-p4 and installing OpenMPI as a third party package through that. When I run cmake, it fails when checking for the function  MPI_Reduce_scatter. Upon examining CmakeFIles/CMakeError.log, I see the compilation of the test program fails because of undefined references to the pthread library. I cannot figure out how to add libpthread to the list of libraries. 

Cheers

Ed

[Jeff Hammond]

Can you attach said log? If OpenMPI need pthreads, it should include that in the mpicc wrappers. 

The PETSc guys on this list will appreciate the log as well. 

Jeff

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[Jeff Hammond]

Ugghh, here they are for the rest of you...


---------- Forwarded message ----------
From: Edward Vigmond <ed.vi...@gmail.com>
Date: Fri, Jul 12, 2013 at 9:12 AM
Subject: Re: building Elemental fails
To: Jeff Hammond <jeff.s...@gmail.com>


Hi

Here are the logs.

Cheers
Ed

--
Jeff Hammond
jeff.s...@gmail.com

[Jeff Hammond]

(please always reply-to-all when sending to this list - I am not the
only person who tries to help users)

How did you invoke CMake? The following is what I use on my Mac:

cmake .. -DCMAKE_CXX_COMPILER=mpicxx -DCMAKE_C_COMPILER=mpicc \
-DCMAKE_Fortran_COMPILER=mpif90 -DMATH_LIBS="-framework Accelerate" \
-DELEM_EXAMPLES=ON -DELEM_TESTS=ON

It seems you have a Linux system, in which case all you need to do is
replace "-framework Accelerate" with the appropriate BLAS library,
e.g. "-llapack -lblas". Maybe you'll need to add "-lgfortran
-lpthread" in some cases.

If you don't have MPI installed, then you need to apt-get, etc. that.
That's not really an Elemental question and I'm sure the internet has
detailed instructions on how to install MPI via the package manager
appropriate for your Linux distribution.

Jeff

On Fri, Jul 12, 2013 at 9:12 AM, Edward Vigmond <ed.vi...@gmail.com> wrote:
> Hi
>
> Here are the logs.
>
> Cheers
> Ed
>
>
>
> On 07/12/2013 04:02 PM, Jeff Hammond wrote:
>

--
Jeff Hammond
jeff.s...@gmail.com

[Edward Vigmond]

I ended up using ccmake to see all the variables.

I tried adding -lpthread to MATH_LIBS with no success. Is this added to
all the intermediate tests in the configuration?

I have MPI installed through my PETSc installation. I have had trouble
using the packaged versions with PETSc.

Generally, I find cmake awesome, but when it doesn't work, it is too
opaque to debug easily unless you set it up.

I think my basic issue remains: I need to add the pthreads library to
the linking.

Cheers
Ed